Orf is a viral infection
which is widespread in sheep and goats and humans are infected by direct
inoculation of infected animal material. It is characterized by a reddish
papule which enlarges to form a hemorrhagic pustule or bulla. It is
usually surrounded by a grayish- white or violaceous ring which is in turn
encircled by a zone of erythema.

This
patient had a close contact with a sheep during a sacrificial ceremony and
got this lesion a few days after contact.